Fireproof floor construction.



No. 678,335 Patented July 9, I90l.

m. L. FREEMAN & c. E. nossm.

HREPROOF FLOUR CONSTRUCTION.

(Application filed Aug. 22, 1900.)

(No Model.)

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PATENT OFFICE.

MARCUS L. FREEMAN AND CLARENCE E. DOBBIN, OF NEW YORK, N. Y.,

ASSIGNORS TO FREEMAN-DOBBIN FIREPROOFING COMPANY, OF SAME PLACE.

FIREPROOF FLOOR CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 678,335, dated July 9,1901. Applicatibn filed August 22, 1900- Serial No. 27,725. (No model.)'

To all whom, it may concern.-

Be it known that we, MARCUS L. FREEMAN and CLARENCE E. DOBBIN, of NewYork, in the county of New York and State of New York, have inventedcertain new and useful Improvements in Fireproof Floor Construction; andwe do hereby declare the following to be afull, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to fireproof floor construction. Y

The primary object of the present improvements is to provide a simpleand inexpensive frame which can be readily constructed and easilyattached to the flanges of the floorbeams and which will itself form arigid support for a floor-arch above and a ceiling below.

A further object is to provide economical covering for the frames, sothat the whole.

will form a support or centering for a floorarch of concrete or otherplastic material while the latter is green.

The invention will be hereinafter fully set forth, and particularlypointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical sectional Viewshowing our improvements, the frame being indicated in elevation. Fig. 2is a plan View of the frame, which is also shown in dotted lines. Fig. 3

is an elevation of the frame detached. Fig. 4 is a View of a slightmodification.

Referring to the drawings, 1 designates a frame'having an upper archedmember 2 and a lower horizontal member 3 formed at their points of unionwith engaging portions 4 for looking on the lower flanges 5 ofconstruction-beams 6. The members 2 and 3 are preferably formed from onecontinuous flat bar set on edge or perpendicular, the free ends beingunited by a nutted bolt or rivet 7. The engaging portions 4. are carriedhorizontally beneath the beam-flanges and thence vertically downward. Itis to these depending vertical portions that the lower member 3 isunited, this union being shown as integral at one end and as beingeffected by the bolt or rivet 7 at the other. It is obvious,however,

that the member 3 may be bolted at each end.

Contiguous to the engaging portions 4: the bar is twisted at rightangles and bent inwardly' and outwardly to form spaces to accommodatethe beam-flanges, the horizontal member 3 being thrown beneath thebeams. By twisting the frame-bar its strength and stiffness are greatlyincreased at the points of engagement with the construction-beams, andthe flattened surfaces engaging the beamflang'es insure the properseatingof the frames. In placing each frame in position across the spacebetween the construction-beams one end is first placed against a flangeof one beam, as shown in dotted lines, Fig. 2, and a blow against theother end of the frame will force it into proper engagement with thecompanion beam. In this wayno special securing means is necessary.

It will be noted that the horizontal member 3 being thrown below theconstruction-beams forms furring for the metal lathing, as 8, forplastering ceiling 9. Such member may be curved or bent into any desiredshape which will best answer as furring, if the ceiling is to be paneledor constructed on any special line. In Fig. 4. we have indicated thisfurring member as independent of the arched member for use where thelatter member is not required.

Thin metallic strips IOjnay be extended transversely of the frames, uponwhich they rest, andlongitudinally of the beams to form bearings forslabs 12. These slabs, which may be of any desired size and shape, arepreferably composed of a mixture of plasterof-paris, asbestos, andfiber. They constitute a continuous foundation or centering upon whichto build up the arch of fireproof material. The edges of these slabspreferably overlap, and in this way the dripping of water and concretematerial which usually structed from a single bar and that the same arecapable of being easily positioned between floor-beams and held in placewithout any securing means other than provided by their bent portionsengaging the bottom flanges. It is obvious that changes may be madewithout departing from our invention. For instance, the frames may becomposed of double steel rods in lieu of flat bars, the latter, however,being preferred. The two members need not be made from one continuousbar. Also the upper member may be set fiat instead of on edge, and alsothe slabs may be made of sheetiron or steelinstead of the compositionhereinbefore specified.

\Ve claim as our invention 1. The combination with the constructionbeamshaving lateral flanges, of a frame between such beams having an upperarched member, a lower horizontal member and means for locking it onsaid flanges, said frame being composed of a single continuous bar bentto form said members, the ends of said bar being united together, as setforth.

2. The combination with constructionbeams having lateral flanges at ornear their bottoms, of a frame between such beams having an uppermember, a lower horizontal member, and engaging portions for looking onsaid beam-flanges, said engaging portions having vertical flangesdepending beneath the beamflange, said frame being composed of a narrowbar or bars bent or twisted to form said members and engagingportions,and said horizontal member being united to said flanges, as setforth.

3. The combination with constructionbeams having lateral flanges at ornear their bottoms, of a frame between such beams having an upper archedmember, a lower horizontal member and engaging portions for looking onsaid beam-flanges, said frame being composed of a single continuous flatbar set on edge to form said arched and horizontal members and twistedat right angles to form Faid1 engaging por-tions, substantially as setort1.

4. The combination with constructionbeams having lateral flanges at ornear their bottoms, of a frame between such beams having a horizontalmember forming furring for a ceiling, such member being composed of aflat bar set on edge and twisted and bent at its ends to form upper andlower portions for engaging the upper and lower surfaces of thebeam-flanges, the latter fitting in spaces between said upper and lowerportions, as set forth.

,5. The combination with constructionbeams having lateral flanges at ornear their bottoms, of frames between said beams composed each of asingle continuous bar having an upper member and engaging portions forlooking on said beam-flanges, and slabs above said frames formingsupports for the material composing the arch, substantially as setforth.

6. The combination with constructionbeams having lateral flanges at ornear their bottoms, of frames between said beams composed each of asingle continuous bar having an arched member and engaging portions forlooking on said beam-flanges, longitudinal strips resting on saidframes, and slabs on said strips forming supports for the materialcomposing the arch, substantially as set forth.

7. The combination with constructionbeams having lateral flanges at ornear their bottoms, of frames between said beams composed each of asingle continuous bar having an arched member, ahorizontal member andengaging portions for looking on said beam flanges, longitudinal stripsresting on said frames, and slabs on said strips forming supports forthe material composing the arch, substantially as set forth.

In testimony whereof we have signed this specification in the presenceof two subscribing witnesses.

MARCUS L. FREEMAN. CLARENCE E. DOBBIN.

Witnesses:

.LoUIs GRAY, J ULES LEVEY.

